Speaking at his media briefing on Monday morning, Wenger admitted that the deal had not been finalised as quickly as he had hoped.

“We are positive this week it can happen,” the Arsenal manager said. “There are a lot of work permit problems and other paperwork. As long as it’s not definitely signed, you have to be cautious. But I’m optimistic about the case.”

The midfielder underwent a medical in Paris a fortnight ago and said his goodbyes to Basle team-mates at the start of last week.

Green light: Wenger has sanctioned a £5.2million bid for Elneny

Elneny will not be registered in time to face Liverpool at Anfield on Wednesday night but Arsenal are hopeful he could be available for the Stoke match.

Wenger has sanctioned an early January move for a central midfielder after long-term injuries robbed him of the services of first-choice pair Francis Coquelin and Santi Cazorla until at least March and possibly longer.

With Mathieu Flamini and Mikel Arteta out of contract next summer, and Jack Wilshere still absent through injury, Wenger has given the go ahead to land Elneny.

Elneny fits the bill for Arsenal because of his pedigree, ability to play in a number of midfield positions and relatively good value.

He joined Basle, initially on loan, in January 2013 and has won three consecutive Swiss league titles with the club.